In the forward installation state, the backrest can be adjusted in three gears, and the handle under the chair seat can be pressed, so the operation is simple and convenient. 1 gear is relatively positive, and in the third gear, the inclination angle is not too large; Reverse installation is also very convenient. Adjust the angle of the seat back to 3rd gear, open the rotary handle on the seat back, rotate the seat by 180 degrees, fasten the handle after rotation, insert ISOFIX, and then fasten the upper drawstring.

The product of safety seat began to appear around the 1960s. By the 1980s, many European and American countries had begun to popularize it, and all of them legislated to force children to use safety seats when riding.